Comparative analysis of spectral characteristics of pulse GPR signals for road pavement assessment
Keywords:non-destructive testing, UWB signals, GPR, road pavements.
Results of experiments on the use of three antenna units of ultra-wideband ground penetrating radars (UWB GPR) for nondestructive testing are presented. These three units have both different values of the centres frequency of the probing UWB pulses and different antenna configurations. The purpose of the performed experiments was to find the best values of sensing parameters. Another task was to optimize the technique for processing signals reflected from plane-layered media. The performed analysis of the obtained results showed the ways for improving the quality of nondestructive testing of road pavement and other building structures by using the UWB GPR. The proposed approach is based on the previously offered algorithm for the stepwise determination of the pavement layer thickness and the relative dielectric permittivity.
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